Perfect date

Waiting for the ISO 8601 & 9001 gang to show up and promote YYYY-MM-DD.

Edit: That took seconds, a very punctual bunch.

Hello I've arrived
- Whoo! ISO-8601 fan club!
YYYYMMDD, scrub out the excess fat!
- I use periods. YYYY.MM.DD
- If only there were some international standards organization to make a decision for us!
That's ... why I'm here
RFC 3339 if you please. Let's be prescriptive.
- After all the self-important blowhards in the committe were satisified that they had put their fingerprint on the ISO8601 document with bullshit like "year-month-week" format support and signed off, they went home.
  The rest stayed behind, waited a few minutes to be safe, and then quickly made RFC3339 like a proper standard.
  This is what RFC3339 vs ISO8601 feels like.
- Anyone help enlighten me about whatever this and unix epoch are getting at? Are these really more specific/better than iso 8601 and why specifically?
I’m now imagining a child who must write 2026-05-10T10:06:09.426792Z on all of their tests.
- They should also add a timezone since most of us don't live at UTC zero timezones -> 2012-12-28T18:12:33+09:00
- Microsecond precision is fine for most use cases, but I teach my kids to use nanoseconds.
- It's a flexible standard. 2026-05-10T10:06:09.426792Z, 2026-05-10 10:06:09.426792Z, 2026-05-10 10:06:09.426792 , and 2026-05-10 all conform to the standard.
I’m doing my part!
ISO 8601/RFC-3339 (Unix Epoch also acceptable) gang reporting in.
ISO thirsty!
It's the only way that makes sense
o7
YYYY-MM-... well, ya know the deal...
Anyone that gives me a document or receipt or invoice with a date formatted DD-MM-YYYY should have a tire iron swung at their thighs
Multiple swings if they can't decide on using DD-MM-YYYY or MM-DD-YYYY or DD-MM-YY or MM-DD-YY or YY-MM-DD or YY-DD-MM
- I rather have somebody write their invoices at DD-MM-YYYY cause there is a bigger chance it will most likely not be an invoice from a North American company which notriously cannot make proper invoices and most software that actually scans and processes invoices is based on the European standaard DD-MM-YYYY or on ISO8601.
Btw this is how it’s used in some countries (eg., Hungary, Japan, China, and a few others from Asia). All other date formats are very strange and confusing for us
As a big ISO 8601 guy myself, I request explanation of this 9001 addition? Never heard of it till now and am optimistic
- Seconded. Not coming up with much when trying to find out more about it.
- Quality Management Systems, unsure what it has to do with 8601, but guess the fanboy venn diagram overlaps
DD-MM-YYYY-HH-MM-SS
Makes no sense!
- I prefer the alphabetical date format DD-HH-MM-SS-mm-yy for maximum confusion
sup

ISO 8601 gang.

Represent.

YYYY-MM-DD if you're doing backup naming, easier to find

Yup, versioned files ALWAYS get a YYYY-MM-DD HHMM timestamp. So when you sort alphabetically, they sort chronologically.
- “Apologies, Jason. It’s you & not me.
  You’re just the opposite of the man I could ever want to spend the rest of my years with.”
- Wrong, not for windows. 1<5<10 there.
Or you’re Canadian

iso8601 aka 2025-06-12

My time abroad has taught me that YYYY/MM/DD is the way to format dates.

YYYYMMDDHHMMSS is the only acceptable format.

ISO 8601 is clearly much superior due to being delimited.
- ISO is paywalled therefore inferior than the free RFC.
Nope, it clearly should be mmsshhMMDDYYYY

For consistency, Americans should adopt mm:ss.hh MM-DD-YYYY.

For consistency, Europeans should adopt ss:mm:hh DD-MM-YYYY.
See how ridiculous that is? ISO8601 or GTFO
- The european one is sorted based on importance to see. The day is more important than the month which is more important than the year. The hour is more important than the minute which is more important than the second
- At least ss:mm:hh and DD-MM-YYYY are internally consistent, even if they aren't consistent with each other.
  MM-DD-YYYY isn't even internally consistent.
You monster
Nah they should adopt metric time and nothing else.

If you use DD/MM/YYYY then logically you should also use ss:mm:hh

SMH...
- Sarcastically Shaking My Many Hydra Heads.
No, because in most cases the most important information about a date is the day, then month, then year. It also matches the way we read dates. For the time it's typically the hour, then minutes, then seconds. YYYY/MM/DD is better when naming files, but in UIs I much prefer DD/MM/YYYY, it's just more natural to the way we read.
Or just use ISO8601 whi uses hh:mm:ss and well it is an ISO standard, but at least DD:MM:YYYY makes more sense than what Americans are doing.
Also 4th of july ....

Don't go with this psycho! He mixes European style order with US style punctuation.

Standard in Australia. And common in the UK (it's traditionally a dot, but slash is more common now).
But I'm team ISO-8601 when there's a chance of an international audience. At least where locale information can't be used.
common in Belgium, probably other countries too

This is stupid AF.

YYYY/MM/DD

This is the best choice.

/ isn't a valid char in filenames, yyyy-mm-dd is better
Its the better choice for digital data I guess. In every day use, the day is the most important thing, then month, then year.
From context, I usually know the year. Probably even the month. So I'll use DD.MM.YYYY. If someone asks me when we're going to meet I won't say "twenty-twentyfive", June, twentieth. And I'm guessing you don't do that either.

For computing or sorting purposes, YYYY-MM-DD is best. But in day to day writing a date, I prefer DD-MON-YYYY.

11-006-2025 ?
- 11-Jun-2025
Single letter for month is too ambiguous - how do you tell apart June, July and January? Also, what do O and N denote?
- Seems you missed the point, it's first three letters of the month, not one. Edit: seems I missed the joke on the post.
What if the day in question isn't a Monday?
I'm sorry that you're wrong... What a bummer.

Heretic!

YYYY.MM.DD is the correct format.

small correction: YYYY-MM-DD to avoid common special meanings chars

Excuse me but !iso8601@lemmy.sdf.org .

That's a tough one. I would have to say April 25. Because it's not too hot, not too cold, all you need is a light jacket.

I'm the only one annoyed about DD/MM/YYYY not being a date, but a date "format"?

Not only it's a recycled joke, it doesn't even make sense.

DD/MM/YYYY or YYYY-MM-DD are formatting conventions for expressing dates. The date itself is probably converted from some date object anyway, like the Unix Epoch, and can be expressed in any variety of formats.
~~Wednesday, June 11, 2025 is a date. dddd, mmm dd, yyyy or %A, %B %d, %Y is a format.~~
Edit: I’m pretty sure I misread the comment above.

I'm fine with anything in the realm of yyyymmdd or reversed, as long as it isn't the confusing format that is common in the USA

rfc3339 my beloved

MM/DD/YY for me.

Edit: I learned something new today.

I never downvote people on Lemmy but I did for this one .... I just spent the past month going through some invoicing and paper receipts and it is absolutely infuriating to still see some businesses using MM-DD-YY while others insist on DD-MM-YY and some businesses have invoicing and receipt printers that use one or the other but not the same. It's not a big deal if you are dealing with documents that are a month or two old because you can guess from what time period they come from ... but it is absolutely confusing if documents get older than that.
I escaped reddit for this?
I stand by this man, do your worst Lemmy.
I'm giving you a pity upvote lol
Stop it Patrick you're scaring them!
Upvoted, because never blame someone who learned something new.
YYYY-MM-DD is for Files
DD.MM.YYYY is for writing a date down.
MM/YY for me. People can figure out the day of month themselves.
Dang you're getting down voted but this is how all Americans talk. It's June 4th 2022.
- Apparently (if you believe things from Lemmy) the American date format is 'barbaric' because it's different from the norm.
Hello, Y2K called, this is literally what caused it. Years stored in 2-digits had to be fixed on every computer on the planet before the calendar rolled to 2000. (People thought nukes would fly, glitches would crash the stock market and the world was going to end)
Same here buddy. It's what I use every day. Welcome to Lemmy, apparently being American is unwelcome around here.
Oh also. Windows, OneDrive and Google really russles some jimmies round here.
- Being American isn't unwelcome here. Using barbaric date formats is.

YYYYMMdd is best for file names.

I prefer verbose for my task bar

ddd, MMMM dd, hh:mm:ss ap (t) Wed, June 11, 09:49:35 am (PDT)

When talking about the date with another human, DD/MM (+YYYY if required); when doing anything related to the sorting of files by date, YYYY/MM/DD.

DD-MMM-YYYY

Ambiguity be damned.

(D)D.(M)M.YY

Nice ragebaiting.

Why is there no format that gives the month in three letter abbreviation so its clear cut what it means?

That's what the us armed forces do. Jun-12-2025

l jS F Y

This fucknuts who thinks day should come before year, hah! Give me YYYY-MM-DD, because dashes are better than slashes any day of the week.

This format is the best. Especially for digital file names, because sorting the files by filename also sorts them by date.